Why does my brand new 15" Retina Macbook Pro have such a sluggish interface?

I just recieved my 15" Retina Macbook Pro 2.4Ghz 8GB RAM GT 650m 1024mb, and it is extremely sluggish when resizing windows, or even launching apps. Its bad enough that it will take 2 seconds some times to see the window move a little bit after attempting to resize it. I haven't installed anything on it so far, I've done all the automatic updates, including the SMC fix for retina displays, ran the Apple hardware scan, and nothing has given me any hints on what gives. I've read other reviews that people have had issues with the retina models being slow when it comes to the interface, and I'm tempted to send my retina model back, in place of the regular Macbook Pro. Any suggestions, or is my plan to replace it my only option if I want a well performing machine?